Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 214, Issue -, Pages 116-122Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.jplph.2017.04.010
Keywords
T-DNA insertion mutant
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Funding
- Next-Generation BioGreen 21 Program, Rural Development Administration, Republic of Korea [PJ011927]
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From a T-DNA-tagging population in rice, we identified OsGASR1 (LOC_Os03g55290), a member of the GAST (gibberellin (GA)-Stimulated Transcript) family that is induced by salt stress and ABA treatment. This gene was highly expressed in the regions of cell proliferation and panicle development, as revealed by a GUS assay of the mutant line. In the osgasr1 mutants, the second leaf blades were much longer than those of the segregating wild type due to an increase in cell length. In addition, five alpha-amylase genes were up-regulated in the mutants, implying that OsGASR1 is a negative regulator of those genes. These results suggest that OsGASR1 plays important roles in seedling growth and alpha-amylase gene expression.
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